Hi Concerned Mom,
Toxins are the cause of pain. Even if one didn't take abx or any other protocol lyme bacteria die off by themselves (that is what our bodies do automatically). Is your daughter detoxing at all? If not, in the sticky thread called "New to Lyme? Start Here" is a section on detoxing with instructions.
As far as the detox baths, I recommend that when a person first starts them (and they can be children), always start slow and make sure the water temperature is warm not hot and drink lots of water during the bath. Dry skin brushing really helps as well as the detox foot baths. It's normal to feel worse after the first bath but the more baths a person takes the better that person feels because they are getting toxins out of their body.
As far as using abx, I can't tell you if that is right or wrong. I do recommend reading books to learn about chronic lyme so you know all your options. I personally recommend:
Stephen Buhner's "Healing Lyme" (amazon.com) and
Dr. David Jernigan "Beating Lyme Disease" (his book can be found on www.hansacenter.com)
Hope this helps,